[Jolin]

Hi,
I am looking for a php script that monitors a site's uptime and downtime. Say, I have a site hosted in Hosting provider A, and I want to monitor the site that is hosted in Hosting Provider B. I would like the script to automatically check site that is hosted in B like every 5 minutes or so. And sends me email when the site is down. Please help. Thanks.

[snaip]

I'd recommend using an remotely hosted uptime monitoring service. Try: http://www.pingdom.com/

[Keith]

Here's a quick piece of code that will do what you'd like. You'd just need to set a cron to hit the script every 5 minutes.

PHP Code:

<?php



// the URL you want to keep tabs on

$url = 'http://www.somewebsite.com';



// if not available, send email

if ( url_exists( $url ) === FALSE )

{

    $to   = 'my@email.com';

    $subj = $url . ' is down!';

    $msg  = $url . ' was tested at ' . date( 'Y-m-d H:i:s' ) . ' and was inaccessible.';

    @mail( $to, $subj, $msg );

}







/**

 * url_exists()

 * Checks for the validity of a given URL

 *

 * @param string The http[s] URL you're checking for

 * @return bool TRUE if online; FALSE if not; NULL if not an http(s):// URL

 */

function url_exists( $strURL = NULL )

{

    if ( !preg_match( '/^http(s?):\/\//i', $strURL, $m ) )

        return NULL;

    @$ch = curl_init();

    curl_setopt( $ch, CURLOPT_URL, $strURL );

    curl_setopt( $ch, CURLOPT_BINARYTRANSFER, 1 );

    curl_setopt( $ch, CURLOPT_HEADERFUNCTION, 'curlHeaderCallback' );

    curl_setopt( $ch, CURLOPT_FAILONERROR, 1 );

    curl_setopt( $ch, CURLOPT_TIMEOUT, 5 );

    // https?

    if ( $m[1] == 's' )

        curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 );

    @curl_exec( $ch );

    $intReturnCode = curl_getinfo( $ch, CURLINFO_HTTP_CODE );

    curl_close( $ch );

    return ( $intReturnCode == 200 OR $intReturnCode == 302 OR $intReturnCode == 304 ) ? TRUE : FALSE;

}



?>

[ctthisi]

I like this script but could you update it show it shows the sites uptime percentage.

chris.

[SpencerB]

Uptime really is a valuable commodity. I use a company called Observe point. They will call, text, or E-mail me if my site ever goes down so I can fix the problem. The reports they send periodically (ones telling how much uptime or downtime I had) are easy to read too. Web Server-Website monitoring is very important to your business no matter how you do it.

[art79]

Maybe cacti monitoring ?

PALM v3 - bundle of Php Apache Linux and Memcached Cacti scripts (APC included) | artur.ejsmont.org

This should give you some idea of what kind of graphs can you easily get out of the box.

ps. it will do ping 'is alive' for you as well.